Olympic track great Usain Bolt's fledgling football career has received a boost, scoring two second-half goals for Central Coast after struggling early in an A-League pre-season game in southwestern Sydney.

Playing in a central striking role against A-League aspirants Macarthur South West United, Bolt battled in the first half, but flourished after the break before being substituted by the Mariners at the 75-minute mark.

Bolt showed good strength to hold off a defender and race onto a Ross McCormack through-ball before beating the goalkeeper at the near post with a fierce left-foot shot in the 55th minute.

He promptly produced his famous lightning bolt celebration.

Just over 10 minutes later, he doubled his tally when he capitalised on a defensive mix-up to pounce on a loose ball and tap in from a few metres out.